The Journey of a Network Engineer

Dec 12 2011   3:56AM GMT

CCIE RS INE Topology in GNS3

Sulaiman Syed Profile: Sulaiman Syed

Many people don’t have the privilege to run a full scale CCIE lab in their basement. I happened to be one of them. So i had to relay on other resources to practice CCIE technologies. Since i have bought my new PC, i can easly run GNS3 with full INE topology.

The topology .net file can be easily found in their website. The problem was, i couldn’t run it from the first instance. I had to edit with many connections. (i actually built the network from scratch, i just used the Frame-Relay mappings as it is).

Please find the attached file here. let me explain the features of this topology in few words

  • Full initial layer two connectivity with IP addressing
  • All ports are up. (you will not require to run the command no shut on any interface)
  • Switches connected with single links
  • EtherChannel was broken and replaced with single link. (known issue of gns3 and layer three etherchannels)
  • all vlans are created and up, ping will work from first time in multiaccess media (ethernet). you will not get the message (encapsulation failed)
  • the IOS use 128MB of ram. If you want to run Netflow, NBAR please make sure to use 256MB of ram for your IOS
  • Works best with GNS3 v0.7.4
If in the case you having some issues with connectivity or the gns3 is crashing just after you start the toplogy, change the ( with localhost) or vice versa in the .net file.
Please remember, that you can’t run most of layer 2 technologies command, since GNS3 (and all emulators) just do the software, where switches are mostly ASIC programmed to run the features.

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